| abstract |
A compound of the formula in which R1 / R2 are independently hydrogen or C1-C7 alkyl; R3 regardless of the number of substituents is hydrogen, halogen, C1-C7 alkyl, C1-C7 alkyl substituted by halogen, C1-C7 alkoxy or C1-C7 alkoxy substituted by halogen; R4 is halogen, C1-C7 alkyl, C1-C7 alkyl substituted by halogen, C1-C7 alkoxy or C1-C7 alkoxy substituted by halogen; ** Formula ** Hetaryl is a heteroaromatic ring that has one or two cycles, is connected to the carbon atoms of the piperidine moiety and is chosen from the group consisting of ** Formula ** I and pharmaceutically suitable acid addition salts, the optically pure enantiomers, racemates or diastereomeric mixtures thereof. |